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NET INCOME PER SHARE
 3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
NET INCOME PER SHARE NET INCOME PER SHARE
The following table presents the computation of basic and diluted net income per share attributable to Intuitive Surgical, Inc. (in millions, except per share amounts):
 Three Months Ended March 31,
 20232022
Numerator:
Net income attributable to Intuitive Surgical, Inc.$355.3 $365.6 
Denominator:
Weighted-average shares outstanding used in basic calculation350.2 358.4 
Add: dilutive effect of potential common shares5.8 8.3 
Weighted-average shares outstanding used in diluted calculation356.0 366.7 
Net income per share attributable to Intuitive Surgical, Inc.:
Basic$1.01 $1.02 
Diluted$1.00 $1.00 
Share-based compensation awards of approximately 3.2 million and 1.5 million shares for the three months ended March 31, 2023, and 2022, respectively, were outstanding but were not included in the computation of diluted net income per share attributable to Intuitive Surgical, Inc. common stockholders, because the effect of including such shares would have been anti-dilutive in the periods presented.